/**
 * Copyright (c) 2010 The Plaid Group (see AUTHORS file)
 * 
 * This file is part of Plaid Programming Language.
 *
 * Plaid Programming Language is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 *  Plaid Programming Language is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Plaid Programming Language.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package plaid.parser.ast;

import java.util.List;

import plaid.parser.Token;


public abstract class Expr extends Stmt {
	
	public static final Expr EMPTY = EmptyExpr.getEmptyExpression();

	public Expr(Token token) {
		super(token);
	}

	public static String exprListToString(List<Expr> exprs) {
		 StringBuilder sb = new StringBuilder();
		 
		 if ( exprs.size() == 1 ) {
			 sb.append(exprs.get(0).toString());
		 } else  if ( exprs.size() > 1 ){
			 sb.append(exprs.get(0));
			 for (int i = 1; i < exprs.size(); i++) {
				 sb.append(",");
				 sb.append(exprs.get(i));
			 }
		 }
		 
		 return sb.toString();
	 }

}
